Criterion .308 Seating Depth Experience

After much screwing around / experimenting with 175g Nosler CC's and IMR-4064 I have found what I believe is the sweet spot on this pipe. Is a 26" CBI, 1-10 twist Savage small-shank Varmint drop-in from Jim @ Nothland.

41.9g IMR-4064 in Lapua brass with Nosler 175 CC's seated Long so at 0.005-0.007 Off Of Lands. Round is not mag. Compatible and regular .308 Ammo Box won't close one them...too long. Have't chrono'ed it yet so don't know speed.

3 rnds in a round-robin load & seating depth ladder came up with 0.183 Minute @ 100 yds. Tip of your pinkie won't fit in that hole.

Must measure chamber well and use a comparator to get this consistent. Too much variation in Meplat length.

God this chamber is LONG...

Just what I found. Maybe can be of help to someone else chasing the bug-holes😜

5 Shots is the minimum, quite humbling.

I sometimes shoot 9 after a bad out of group one to prove to myself it was something odd happened.

Each one tends to shoot deferent, I take my RCBS Junior to the range with a seating die and play with it.

On the other hand, my 308win Shilen pre-fit has very short freebore.

All my Shilen pre-fits have short freebore :sorrow::frusty:

But I guess it's easier to lengthen the freebore with a throater than to shorten the freebore.

That's the nice thing about 30-06, you have lots of case capacity and can play to your hearts content with COAL!

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Originally Posted by RC20

5 Shots is the minimum, quite humbling.

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I never shoot 5 during load development. If 2 aren't touching or close to it, no reason to shoot 3 more unless you called a bad one.